邮电设计技术
郵電設計技術
유전설계기술
DESIGNING TECHNIQUES OF POSTS AND TELECOMMUNICATIONS
2015年
3期
88-92
,共5页
低压成套开关设备%保护导体%截面积%短路电流%热稳定校验
低壓成套開關設備%保護導體%截麵積%短路電流%熱穩定校驗
저압성투개관설비%보호도체%절면적%단로전류%열은정교험
Low-voltage switchgear assemblies%Protective conductor%Cross-sectional area%Short-circuit current%Thermal stability check
对于低压成套开关设备,保护导体(PE)的选择直接关系到故障情况下电源是否能够自动断开,对于人身安全和设备安全都非常重要。合理选择保护导体截面积,在确保人身安全及设备安全的前提下,降低设备投资。介绍了低压成套开关设备保护导体的定义、作用及选择的主要因素、国家标准对保护导体的规定,分析了不同保护导体选择方法的区别,提出电气工程设计中保护导体选择的建议方法。
對于低壓成套開關設備,保護導體(PE)的選擇直接關繫到故障情況下電源是否能夠自動斷開,對于人身安全和設備安全都非常重要。閤理選擇保護導體截麵積,在確保人身安全及設備安全的前提下,降低設備投資。介紹瞭低壓成套開關設備保護導體的定義、作用及選擇的主要因素、國傢標準對保護導體的規定,分析瞭不同保護導體選擇方法的區彆,提齣電氣工程設計中保護導體選擇的建議方法。
대우저압성투개관설비,보호도체(PE)적선택직접관계도고장정황하전원시부능구자동단개,대우인신안전화설비안전도비상중요。합리선택보호도체절면적,재학보인신안전급설비안전적전제하,강저설비투자。개소료저압성투개관설비보호도체적정의、작용급선택적주요인소、국가표준대보호도체적규정,분석료불동보호도체선택방법적구별,제출전기공정설계중보호도체선택적건의방법。
Due to low-voltage switchgear assemblies, the selection of protective conductor is directly related to whether the power sup-ply can be automatical y disconnected under fault conditions. It is very important for the person safety and equipment safety. On the premise of ensuring personal safety and equipment safety, the investment wil be reduced by reasonable selection of protective conductor cross-sectional area. It introduces the definition, function and main factors affecting the choice of protec-tive conductor of low-voltage switchgear assemblies. It describes national standard requirements for protective conductor. It analyzes different methods of protective conductor selection. Final y it presents the recommended methods on protective con-ductor selection in electric engineering design.